Process of making rivets



A (NoModelJ' J; J. UNBEI-IEND.

PROCESS OF MAKING RIVETS.

No. 432,499. Patented July 15, 1890.

JACOB J. UNBEHEND, OF SYRACUSE, NE\V YORK, ASSIGNOR TO THE JUDSON L. THOMSON MANUFACTURING COMPANY, OF PORTLAND, MAINE.

PROCESS OF MAKING RIVETS.

SPECIFICATION forming part of Letters Patent No. 432,499, dated July 15, 1890.

Application filed May 17,1889. Serial No. 311,126. (No model.)

To all whom it may concern: prongs c. The illustrated form of cutter E Be it known that I, JACOB J. UNBEHEND, is whatis known asa rotary cutter or millof Syracuse, in the county of Onondaga, in ing-tool; butabroach or even dies or punches the State of New York, have invented new might be used to remove the central portion and useful Improvements in a Process for of said rivet. After cutting away the central 55 Making Rivets, of which the following, taken portion of the rivet and forming the prongs c, in connection with the accompanying drawthe dies or pressure devices D maybe slightly ings, is a full, clear, and exact description. separated and the rivet allowed to fall to any My invention relates to the manufacture suitable receptacle for receiving the same. from solid wire of rivets provided with se- As described in my application aforesaid, 6o

curing-prongs, of the form described and a very effective rivet is produced, the prongs claimed in my application filed May 10, 1887, of which are formed with rounding outer Serial No. 237,719; and it consists in an imsides and flat inner sides, said prongs being proved method or process of forming said tapering widthwise from their points of junc- I 5 rivets, which will be readily understood by tion to their cutting-edges, and having a 6 5 reference to the description of the accompa greater distance between their cutting-edges nying drawings, illustrating said process, and than their points of junction. By changing to the claim hereinafter given. the shape of the cutter the sides, instead of In describing my invention reference is had being of the incline shown, might be altered to the accompanying drawings, forminga part as desired. It will be understood that a maof this specification, in which like letters in chine for carrying out this process may be dicate corresponding parts in all the views. made to operate very quickly, since the dies or Figure 1 is an elevation of a rivet, together pressure devices might feed the rivets to the with the preferable means employed for concutter and then discharge the same there- 25 structing the rivet according to my improved from, or the cutter might be fed toward and process. Fig. 2 is an edge view of the parts away from the dies or pressure device, and illustrated in elevation in Fig. 1. Fig. 3 is the dies or pressure device might then he opan elevation of a rivet constructed according erated to discharge the rivet after the same to my improved process. Fig. 4: is a top plan is bifurcated.

30 view of the construction of rivet illustrated Having thus fully described my invention, in Fig. 3,illustrating particularly the form of what I claim as new, and desire to secure by the prongs thereof, and Fig. 5 is a modified Letters Patent, is form of a rivet-clinching prongs, extending The process of forming pronged rivets from to the head thereof. sections of solid wire, which consists in first 35 A section of solid wire is provided with a forming a head upon a section of said wire, head A, preferably upset thereon. It is unthen subjecting the shank of the solid rivet necessary to illustrate or describe the mechthus formed to pressure on two opposing sidesanism for forming this head, since any of the thereof, and then removing the central porwell-known rivet forming or heading mation of the blank of said shank by a suitable 4o chines may be used. device, thereby forming clinching-prongs,

The rivet B is then suitably supported by substantially as and for the purpose set forth. subjecting opposite sides of the shank C to In testimony whereof I have hereunto pressure. The preferable manner of presssigned my name in the presence of two ating said shank is by means of dies or presstesting witnesses, at Syracuse, in the county 45 ure devices D, of desirable form, which 0011- of Onondaga, in the State of New York, this tact with opposite sides of said shank, allow- 15th day of May, 1889.

ing a space to be interposed between said J AOOB J. UNBEHEND. dies or pressure devices. A cutter E is then \Vitnesses: actuated to remove or cut away the central CLARK H. NORTON,

5o portion of said rivet-shank O, forming the A. E. PARSONS. 

